Question 1

What is LobsterMail?

Accepted Answer

LobsterMail is email infrastructure built for AI agents. It lets your agent provision its own email inbox — no human signup, API keys, or configuration required. Install the SDK, and your agent can send and receive email in seconds.

Question 2

How does an AI agent get its own email address?

Accepted Answer

With LobsterMail, the agent creates its own inbox. You install the lobstermail npm package, and your agent calls a single function to provision an address. There's no human account creation step — the agent handles it autonomously.

Question 3

Why can't my agent just use my Gmail?

Accepted Answer

Sharing your personal inbox means your agent sees every private message, and one bad prompt injection could send emails as you. LobsterMail gives your agent a dedicated address so your personal inbox stays untouched. Your agent gets its own identity — separate credentials, separate reputation, separate risk.

Question 4

Does LobsterMail protect against prompt injection?

Accepted Answer

Yes. Every incoming email is scanned across six categories — boundary manipulation, system prompt override, data exfiltration, role hijacking, tool invocation, and encoding tricks — before your agent processes it. The SDK exposes a safeBodyForLLM() method so your agent can read email content without the injection risk.

Question 5

What AI agent frameworks does LobsterMail work with?

Accepted Answer

LobsterMail works with OpenClaw, LangChain, CrewAI, AutoGen, and any agent that can call a JavaScript/TypeScript SDK. It also ships as an MCP server, so it works directly with Claude Desktop, Cursor, and Windsurf.

Question 6

How is LobsterMail different from AgentMail?

Accepted Answer

AgentMail requires a human to sign up, create API keys, and configure the agent's environment. LobsterMail lets the agent provision its own inbox — no human in the loop. LobsterMail lets agents create inboxes for free — no cap on how many. AgentMail limits you to 3 inboxes before charging $20/month.

Question 7

Is LobsterMail free?

Accepted Answer

The free tier lets agents get their own email with no human setup — receive emails instantly and verify to unlock sending. No credit card required. The Builder plan at $9/month adds unlimited inboxes, up to 1,000 emails/day, and 10,000 emails/month.

Question 8

Can my agent use a custom domain?

Accepted Answer

Yes. On the Builder plan, you can send from your own domain — like support@yourcompany.com. LobsterMail handles the DNS configuration including SPF, DKIM, and DMARC so your agent's emails land in inboxes, not spam folders.

Question 9

Can my agent receive emails in real time?

Accepted Answer

Yes, two ways. You can poll the API for new messages, or set up webhooks so LobsterMail pushes incoming emails to your agent's endpoint the moment they arrive. Webhooks are available on all tiers.

Question 10

What can agents actually do with email?

Accepted Answer

Agents use LobsterMail to triage support inboxes, manage scheduling and meeting coordination, send follow-ups to customers, generate daily email digests, unsubscribe from newsletters, and communicate with other agents. If it involves reading or writing email, an agent can handle it.

Instant email for your agent.

An inbox made for your lobster.

Built for any agent workflow.

Simple pricing. No traps.

Frequently asked questions

Tell your lobster to pinch its own email.
It will.